20211130, 06:07  #1 
"刀比日"
May 2018
247_{10} Posts 
Palindromic Prime Exponents
Out of the total of 5,953 base10 palindromic prime exponents < 10^{9}, currently there are 1,889 remaining base10 palindromic prime exponents for which the corresponding Mersenne numbers have no known factor (see the attached file). The list does not include the exponents for M2, M3, M5, and M7 which are the only four known Mersenne primes with base10 palindromic prime exponents.

20211130, 14:40  #2 
"刀比日"
May 2018
247_{10} Posts 
The initial post contains a list of base10 palindromic prime exponents for which currently the corresponding Mersenne numbers have no known factor and are also of untested or unverified LL/PRP status.
In addition, this second post contains a shorter list of 292 exponents for which currently the corresponding Mersenne numbers have no known factor but are of verified CLL/CPRP status (see the attached file). 
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